1221153152010 has 192 divisors, whose sum is σ = 3276206849664. Its totient is φ = 291029207040.

The previous prime is 1221153152003. The next prime is 1221153152047. The reversal of 1221153152010 is 102513511221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 82934509 + ... + 82949231.

It is an arithmetic number, because the mean of its divisors is an integer number (17063577342).

Almost surely, 2^{1221153152010} is an apocalyptic number.

1221153152010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221153152010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1638103424832).

1221153152010 is an abundant number, since it is smaller than the sum of its proper divisors (2055053697654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221153152010 is a wasteful number, since it uses less digits than its factorization.

1221153152010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15141 (or 15130 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 1221153152010 its reverse (102513511221), we get a palindrome (1323666663231).

The spelling of 1221153152010 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-three million, one hundred fifty-two thousand, ten".